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Merge pull request #93248 from giuseppe/cgroup-set-max-shares

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kubelet: clamp cpu.shares to max allowed
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Kubernetes Prow Robot 2020-07-20 19:51:14 -07:00 committed by GitHub
commit c09ecf13a5
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1 changed files with 8 additions and 2 deletions
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10
pkg/kubelet/cm/helpers_linux.go
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@ -38,8 +38,11 @@ import (
) )
const ( const (
// Taken from lmctfy https://github.com/google/lmctfy/blob/master/lmctfy/controllers/cpu_controller.cc // These limits are defined in the kernel:
MinShares = 2 // https://github.com/torvalds/linux/blob/0bddd227f3dc55975e2b8dfa7fc6f959b062a2c7/kernel/sched/sched.h#L427-L428
MinShares = 2
MaxShares = 262144
SharesPerCPU = 1024 SharesPerCPU = 1024
MilliCPUToCPU = 1000 MilliCPUToCPU = 1000
@ -88,6 +91,9 @@ func MilliCPUToShares(milliCPU int64) uint64 {
if shares < MinShares { if shares < MinShares {
return MinShares return MinShares
} }
if shares > MaxShares {
return MaxShares
}
return uint64(shares) return uint64(shares)
} }